PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-19:27:40
G01     320.9          11.1               -6.7 +/-   38.98     -18.2 +/-   38.98  0.260 / 0.410
G08     264.9          16.9               10.4 +/-    1.95      24.7 +/-    1.95  0.220 / 0.310
G10     65.3           57.8               10.0 +/-    0.54      11.6 +/-    0.54  0.150 / 0.350
G11     310.1          18.4               10.2 +/-    1.87      23.3 +/-    1.87  0.150 / 0.420
G14     274.1          67.8               11.4 +/-    0.62      12.2 +/-    0.62  0.040 / 0.090
G18     95.3           33.1               11.2 +/-    0.79      18.5 +/-    0.79  0.050 / 0.100
G27     228.7          13.7               11.8 +/-    5.35      30.2 +/-    5.35  0.030 / 0.020
G31     179.3          31.6               12.4 +/-    3.03      21.0 +/-    3.03  0.020 / 0.030
G32     343.9          73.0               11.0 +/-    0.51      11.4 +/-    0.51  0.050 / 0.050